摘要:
A clutch transmission, in particular a dual-clutch transmission for a vehicle, such as a motor vehicle, includes at least one automatic transmission with a hydraulically actuatable clutch and at least one hydraulically actuatable gear actuator, and a hydraulic circuit having a tank supplying an unpressurized hydraulic medium and a pressure source supplying a pressurized hydraulic medium. For operating the respective clutch, a first pressure control valve and at least one second pressure control valve are arranged upstream of the respective coupling. At least one of the pressure control valves is connected with an upstream switching device which connects the at least one pressure control valve and a hydraulically actuatable parking lock either with the pressure source or with the tank.
摘要:
A method for protecting a user's privacy, wherein the user operates a communication device capable of processing context and wherein the user provides context information—real context—related to one or more reference context variables to a third party, is characterized in the steps of faking at least one of the one or more reference context variables, on the basis of the faked reference context variable, gathering real context information—decoy context—related to reference context variables other than the faked reference context variable, publishing the thus generated decoy context instead of the user's real context. In addition, a corresponding communication device is disclosed.
摘要:
The invention relates to a spindle motor having a fluid dynamic bearing system comprising axial and radial bearings that contains a rotor component (14) which encloses a stationary shaft (12), which in turn is connected at both its ends to axially aligned bearing parts (16; 18) that are fashioned such that they form capillary sealing gaps (32; 34), a recirculation channel (28) filled with bearing fluid that connects the remote regions of the bearing to each other, and an electromagnetic drive system (42, 44) for driving the rotor component.
摘要:
A method for protecting a user's privacy, wherein the user operates a communication device capable of processing context and wherein the user provides context information—real context—related to one or more reference context variables to a third party, is characterized in the steps of faking at least one of the one or more reference context variables, on the basis of the faked reference context variable, gathering real context information—decoy context—related to reference context variables other than the faked reference context variable, publishing the thus generated decoy context instead of the user's real context. In addition, a corresponding communication device is disclosed.
摘要:
A permanent magnetic motor having a magnetic axial bearing and one or more fluid bearings, wherein a stator unit is disposed on a baseplate, the stator unit being disposed opposite a magnet ring made up of permanent magnets and being separated from the magnet ring by an air gap, and the magnet ring is fixed to the inside circumference of a circumferential hub that is supported with respect to a bearing bush by means of the fluid bearings via a shaft, and at least one fluid dynamic axial bearing is preloaded with an axial attractive force component that is at least partly generated by a ferromagnetic pull ring that is fixed to the baseplate and disposed below the magnet ring and permeated by its field lines, characterized in that, seen magnetically, the stator unit is centered with respect to the magnet ring and has no significant axial offset and that the pull ring has no or only relatively low electrical conductivity at high magnetic permeability.
摘要:
The invention relates to a fluid dynamic bearing system that comprises a first conical bearing and a second conical bearing working in opposition to the first conical bearing, the conical bearings being disposed along a stationary shaft. The first conical bearing has a first bearing cone disposed on the shaft having bearing surfaces extending at an angle α to the rotational axis, and a first bearing bush having a tapered bearing bore and bearing surfaces that are separated by a first bearing gap filled with bearing fluid from the bearing surfaces of the first bearing cone. The second conical bearing has a second bearing cone disposed on the shaft having bearing surfaces extending at an angle β to the rotational axis, and a second bearing bush having a tapered bearing bore and bearing surfaces that are separated by a second bearing gap filled with bearing fluid from the bearing surfaces of the second bearing cone. According to the invention, the bearing surfaces of the first conical bearing are smaller in surface area than the bearing surfaces of the second conical bearing and the angle α is greater than the angle β.
摘要:
The invention relates to a magnetic axial bearing for taking up axial forces that act on a rotor component that is rotatably supported about a rotational axis with respect to a stator component. The bearing comprises a first bearing part consisting of at least one permanent magnet and at least two flux guide elements associated with the permanent magnet that are disposed on opposing end faces of the permanent magnet and aligned substantially radial and perpendicular to the rotational axis, and a second bearing part consisting of at least two flux guide elements that are disposed at a mutual spacing to one another and aligned substantially radial and perpendicular to the rotational axis, each flux guide element of the second bearing part being associated with a flux guide element of the first bearing part and lying directly opposite the latter in a radial direction and separated from it by an air gap. The invention further describes a spindle motor having a magnetic axial bearing of this kind, used, for example, for driving a hard disk drive.
摘要:
In a CT system and a method for error-tolerant data transfer between a data acquisition unit and an image reconstruction unit therein, digital data are divided into data packets and are transferred as a data stream from a transmission device to a reception device and are buffered in the reception device for further processing. The data packets are selected such that they respectively contain the data of a segment of a detector row or of a complete detector row of the CT system. Incomplete and/or missing focal paths are detected in the reception device and a storage region is reserved and marked as incorrect for these data packets. The incorrect and/or missing data packets are later interpolated from the data of adjacent detector rows and/or adjacent segments of a detector row and/or successive projections precede or follow the incorrect and/or missing data packets. Missing data packets due to transfer interferences can also be tolerated.
摘要:
The invention relates to a fluid dynamic bearing system that comprises at least one stationary part that has a shaft and two bearing plates disposed on the shaft at a mutual spacing, and at least one rotating part that is supported so as to rotate about a rotational axis with respect to the stationary part, and comprises a bearing bush and a sleeve enclosing the bearing bush. A bearing gap filled with bearing fluid is provided between the parts and at least one sealing gap for sealing the bearing gap that extends concentric to the rotational axis. The bearing comprises at least one fluid dynamic radial bearing and two fluid dynamic axial bearings and at least one recirculation channel that connects the two axial bearing regions to each other. According to the invention, the largest radial diameter of the recirculation channel is greater than or equal to the largest diameter of the sealing gap, and the smallest radial diameter of the recirculation channel is greater than or equal to the largest diameter of an adjacent bearing plate. Moreover, additional and effective deairing of the recirculation channel is effected by a venting device. To realize improved equilibrium of pressure in the bearing gap and improved retention of the bearing fluid, the sealing gaps can be inclined, at least in sections, at an angle α, β with respect to the rotational axis, wherein the angles may have different sizes.
摘要:
The invention relates to an electric motor, particularly a spindle motor used for driving storage disks in hard disk drives, having a stationary bearing part (14), a shaft (16) rotatably supported in the stationary bearing part, a hub (18) connected to one end of the shaft and an electromagnetic drive system. The electric motor is characterized in that the hub (18) is at least partly made of a metal alloy having a high specific damping capacity.